Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
ELECTRONIC “MATCH”
They say you can't save much on matches, and yet... A simple and practical electronic "match," the description of which we offer to readers' attention, will free you from the need to...
The MiG-at
Latest military aircraft, developed in OKB Mikoyan. Developed on a competitive basis with the Yak-130. Designed to prepare pilots for the fighters of the fourth generation type MiG-29...
